(Fc_6); Over Frequency - Briggs & Stratton 040213 Service And Troubleshooting Manual

Service & Troubleshooting Guide - Home Generator System - Models 040213 and 040234 (15kW)
Section 2 - Troubleshooting Information

(FC_6)

OVER FREQUENCY:

IMPORTANT
: The troubleshooting steps for under and
over frequency faults are identical. Refer to (Fig. 33) to
troubleshoot &
(FC_5) (FC_6)
over-frequency is a symptom of a governor related
failure. Refer to
"VANGUARD™ V-Twin OHV Repair
for procedures to check the condition
Manual (#272144)."
and/or repair of the engine governor
This feature protects the devices that are plugged into
the circuits powered by the Home Generator System. Its
purpose is to shut down the generator if it runs faster
than the governed RPM limit.
The CMA/Control Panel monitors generator output
frequency at
Wire #s E1 and E2
frequency (directly proportional to engine RPM)
increases to the CMA waits three seconds
65Hz-70Hz,
before shutting the unit down. If the frequency exceeds
at all, the CMA instantly shuts the generator down
70Hz
and displays at the control panel.
"FC_6"
NOTE
: If so equipped, the CMA simultaneously
signals the remote LED to flash in a sequence of
six blinks and displays "Over Frequency" on the
Statstation™ screen as well.
The reason for this latitude in sensing output frequency
is that often a governor will hunt for the desired setting.
This causes variable frequency outputs that are not
harmful until they reach the
governor fail completely, the RPM will increase
uncontrolled. In this case, the generator will appear to
stall immediately after starting. In reality, it is shut down
when the output frequency reaches
fault indications. However,
. If the generator output
range. Should the
65Hz-70Hz
70Hz.
2
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